This is what full EH server under ddos looks like

Haven't had the chance to look at it yet, though I've experienced several so I have an idea of what it is like.

How do you know it was a DDoS though? Could have been the CPU under a peak load or perhaps a network glitch on the infrastructure?
 
net graph 5

Var/Msec is normal, it will show 10/20/30/40 or higher if CPU/Ram Lag. it was normal so this was network and you can look at people's ping too.